Spinning viscous liquids in flowing feeding liquids



E. ELSAESSER.

SPINNING VISCOUS LIQUIDS IN FLOWING FEEDING LIQUIDS.

APPLICATlON FILED APR. 12, 1917.

1,414,076. Patented Apr. 25, 1922.

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hoiwww BNVWSMWA area states meat crates.

TO THE CHEMICAL FOUNDATION, IN (3.,

A CORPORATION OF DELAWARE.

SPINNING VISCOUS LIQUIDS IN FLOWING FEEDING LIQUIDS.

Specification of Letters Patent. Patented Apr. 25, 1922.

Application filed April 12, 1917. Serial No. 161,632

(GRANTED UNDER THE PROVISIONS or run ACT or Manon 3, 1921, 41 STAT.Q1313.

To all wiwm it may concern:

Be it known that I, EMIL ELSAESSER, a citizen of the German Empire,residing at Langerfeld, Westphalia, Germany, have invented certain newand useful Improvements of Spinning Viscous Liquids in F lowing FeedingLiquids, (for which I have filed application in Germany Aug. 25, 1916;)and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My improvement relates to spinning viscous liquids, while flowingliquids are used for feeding the thread.

In the practice, heretofore, of such a process, the feeding liquid,being under reduced pressure, nearly alwayscontains air. s aconsequence, it was found that bubbles were present in the feeding orflowing liquid, and that such bubbles have been very disturbing in theformation of the thread from the'solution of copper-oxide ammoniacellulose.

It is an object of this invention to use as the feeding or flowingliquid one which contains no gases, and so cannot give off bubbles.

In carrying out my invention, therefore, I remove all the gases (air,for instance, where Water is employed) from such liquid before thecoagulating process. The removal of such gases may be assured byevacuation, orv by heating, or by evacuation assisted by heating. As aconsequence, there will be no bubbles in the liquid when used forfeeding or flowing the threads.

Owing to the absence of the bubbles, the spinning process is carried outvery evenly, and without any breaking of the thread.

In the practice of my process, I may use any suitable apparatus. Theaccompanying drawing shows (somewhat diagrammatically) an apparatususeful in carrying out the process.

a is a reservoir for the feeding or flowing liquid (water, forinstance). 6 is a pipe leading therefrom and into the upper part of aclosed tank, 0, which is connected, by

pipe 01, with a suitable vacuum pump.

is a pipe leading from the lower part of the tank, to the spinningmachine indicated at e.

The liquid is drawn from reservoir a into tank c, and the gases arethere drawn off, by the pump, from the liquid. Then the liquid passes,by the pipe 7 to the spinning machine.

Heat may be applied to the liquid while in reservoir a or in tank 0, orat both such points. The heating will assist in driving off the gases.

As tank 0 is arranged a considerable distance (in practice, thirty feet)above the spinning machines, it follows that a good vacuum. will bemaintained in the tank, to effect a thorough evacuation of the liquid.

The liquid, freed from bubbles, is deliv-- ered into the spinningmachines and is there used for the flowing of the threads of thecellulose solution and the coagulation of the same.

IVhat I claim is:

1. In the spinning of a viscous liquid by the aid of another liquid, thesteps comprising removing gases and bubbles from the second-namedliquid, and afterwards using said liquid as the coagulating and flowingbath for assisting the flowing and formation of threads oft-he viscousliquid. 1 2. In the spinning of a viscous liquid by the aid of anotherliquid, the process which consists in subjecting the second-named liquidto the action of a vacuum to'remove gases and bubbles therefrom, andafterwards using said liquid as the coagulating and flowing bath forassisting the flowing anl formation of threads of the viscous liqui 3.In the spinning of a viscous liquid by the aid of another liquid, thesteps com-' prising removing gases and bubbles from the second-namedliquid, and afterwards using said liquid for assisting the flowing andformation of threads of the viscous liquid.

In testimony whereof'I hereunto aflix my signature in the presence oftwo witnesses.

EMIL ELSAESSER.

